The murderous thing now elbowed itself along the road toward the town, leaned against the first house, crushed it, and proceeded to wander hither and thither, pushing everything down before it, as though it were a lava-stream. The inhabitants took to their heels, but several were licked up and slaughtered.
Powerful beam radiation was now poured into the cloud from all the neighbouring installations. Its destructive activity slackened, and once more it began to disintegrate and expand. Presently it streamed upwards as a huge column of smoke; and, at a great altitude, it dissipated itself again into a swarm of the original green cloudlets, noticeably reduced in numbers. These again faded into a uniform greenish tinge, which gradually vanished.
Thus ended the first invasion of the Earth from Mars.
2. LIFE ON MARS
Our concern is with humanity, and with the Martians only in relation to men. But in order to understand the tragic intercourse of the two planets, it is necessary to glance at conditions on Mars, and conceive something of those fantastically different yet fundamentally similar beings, who were now seeking to possess man’s home.
To describe the biology, psychology and history of a whole world in a few pages is as difficult as it would be to give the Martians themselves in the same compass a true idea of man. Encyclopaedias, libraries, would be needed in either case. Yet, somehow, I must contrive to suggest the alien sufferings and delights, and the many aeons of struggle, which went to the making of these strange nonhuman intelligences, in some ways so inferior yet in others definitely superior to the human species which they encountered.
Mars was a world whose mass was about one-tenth that of the earth. Gravity therefore had played a less tyrannical part in Martian than in terrestrial history. The weakness of Martian gravity combined with the paucity of the planet’s air envelope to make the general atmospheric pressure far lighter than on earth. Oxygen was far less plentiful. Water also was comparatively rare. There were no oceans or seas, but only shallow lakes and marshes, many of which dried up in summer. The climate of the planet was in general very dry, and yet very cold. Being without cloud, it was perennially bright with the feeble rays of a distant sun.
Earlier in the history of Mars, when there were more air, more water, and a higher temperature from internal heat, life had appeared in the coastal waters of the seas, and evolution had proceeded in much the same manner as on earth. Primitive life was differentiated into the fundamental animal and vegetable types. Multicellular structures appeared, and specialized themselves in diverse manners to suit diverse environments. A great variety of plant forms clothed the lands, often with forests of gigantic and slender-stemmed plumes. Mollusc-like and insect-like animals crept or swam, or shot themselves hither and thither in fantastic jumps. Huge spidery creatures of a type not wholly unlike crustaceans, or gigantic grasshoppers, bounded after their prey, and developed a versatility and cunning which enabled them to dominate the planet almost as, at a much later date, early man was to dominate the terrestrial wild.
But meanwhile a rapid loss of atmosphere, and especially of watervapor, was changing Martian conditions beyond the limits of adaptability of this early fauna and flora. At the same time a very different kind of vital organization was beginning to profit by the change. On Mars, as on the Earth, life had arisen from one of many “subvital” forms. The new type of life on Mars evolved from another of these subvital kinds of molecular organization, one which had hitherto failed to evolve at all, and had played an insignificant part, save occasionally as a rare virus in the respiratory organs of animals. These fundamental subvital units of organization were ultramicroscopic, and indeed far smaller than the terrestrial bacteria, or even the terrestrial viruses. They originally occurred in the marshy ponds, which dried up every spring, and became depressions of baked mud and dust. Certain of their species, borne into the air upon dust particles, developed an extremely dry habit of life. They maintained themselves by absorbing chemicals from the wind-borne dust, and a very slight amount of moisture from the air. Also they absorbed sunlight by a photosynthesis almost identical with that of the Plants.
To this extent they were similar to the other living things, but they had also certain capacities which the other stock had lost at the very outset of its evolutionary career. Terrestrial organisms, and Martian organisms of the terrestrial type, maintained themselves as vital unities by means of nervous systems, or other forms of material contact between parts. In the most developed forms, an immensely complicated neural “telephone” system connected every part of the body with a vast central exchange, the brain. Thus on the earth a single organism was without exception a continuous system of matter, which maintained a certain constancy of form. But from the distinctively Martian subvital unit there evolved at length a very different kind of complex organism, in which material contact of parts was not necessary either to coordination of behaviour or unity of consciousness. These ends were achieved upon a very different physical basis. The ultramicroscopic subvital members were sensitive to all kinds of etherial vibrations, directly sensitive, in a manner impossible to terrestrial life; and they could also initiate vibrations. Upon this basis Martian life developed at length the capacity of maintaining vital organization as a single conscious individual without continuity of living matter. Thus the typical Martian organism was a cloudlet, a group of free-moving members dominated by a “group-mind.” But in one species individuality came to inhere, for certain purposes, not in distinct cloudlets only, but in a great fluid system of cloudlets. Such was the single-minded Martian host which invaded the Earth.
The Martian organism depended, so to speak, not on “telephone” wires, but on an immense crowd of mobile “wireless stations,” transmitting and receiving different wave-lengths according to their function. The radiation of a single unit was of course very feeble; but a great system of units could maintain contact with its wandering parts over a considerable distance.
One other important characteristic distinguished the dominant form of life on Mars. Just as a cell, in the terrestrial form of life, has often the power of altering its shape (whence the whole mechanism of muscular activity), so in the Martian form the free-floating ultramicroscopic unit might be specialized for generating around itself a magnetic field, and so either repelling or attracting its neighbours. Thus a system of materially disconnected units had a certain cohesion. Its consistency was something between a smoke-cloud and a very tenuous jelly. It had a definite, though ever-changing contour and resistant surface. By massed mutual repulsions of its constituent units it could exercise pressure on surrounding objects; and in its most concentrated form the Martian cloud-jelly could bring to bear immense forces which could also be controlled for very delicate manipulation. Magnetic forces were also responsible for the mollusc-like motion of the cloud as a whole over the ground, and again for the transport of lifeless material and living units from region to region within the cloud.
The magnetic field of repulsion and attraction generated by a subvital unit was much more restricted than its field of “wireless” communication. Similarly with organized systems of units. Thus each of the cloudlets which the Second Men saw in their sky was an independent motor unit; but also it was in a kind of “telepathic” communication with all its fellows. Indeed in every public enterprise, such as the terrestrial campaigns, almost perfect unity of consciousness was maintained within the limits of a huge field of radiation. Yet only when the whole population concentrated itself into a small and relatively dense cloud-jelly, did it become a single magnetic motor unit. The Martians, it should be noted, had three possible forms, or formations, namely: first, an “open order” of independent and very tenuous cloudlets in “telepathic” communication, and often in strict unity as a group mind; second, a more concentrated and less vulnerable corporate cloud; and third, an extremely concentrated and formidable cloud-jelly.